<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Test mrow fallback for some MathML elements</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#script-and-limit-schemata">
<meta name="assert" content="Verify that invalid markup fallbacks to row layout.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<script src="/mathml/support/fonts.js"></script>
<script src="/mathml/support/layout-comparison.js"></script>
<script src="/mathml/support/mathml-fragments.js"></script>
<script src="/mathml/support/invalid-markup.js"></script>
<style>
  /* Revert style specified in the UA style sheet that changes box size. */
  mfrac { padding-inline: 0; }
</style>
<script>
  setup({ explicit_done: true });
  window.addEventListener("load", () => { loadAllFonts().then(runTests); });

  function runTests() {
    let container = document.getElementById("container");
    let invalidMarkup = generateInvalidMarkup();
    container.appendChild(invalidMarkup);
    const epsilon = 1;

    for (let math of invalidMarkup.children) {
      let element = math.firstElementChild;
      let reference = element.nextElementSibling;
      let description = element.dataset.description;
      test(function() {
        compareLayout(element, reference, epsilon);
        assert_approx_equals(element.getBoundingClientRect().top, reference.getBoundingClientRect().top, epsilon);
      }, `Invalid <${element.tagName}> should lay out as an mrow (${description})`);
    }

    done();
  }
</script>
</head>
<body>
  <div id="log"></div>
  <div id="container"></div>
</body>
</html>
